First application of multilayer graphene cantilever for laser photoacoustic detection

Suchánek, Jan; Dostál, Michal; Vlasáková, Tereza; Janda, Pavel; Klusáčková, Monika; Kubát, Pavel; Nevrlý, Václav; Bitala, Petr; Civiš, Svatopluk; Zelinger, Zdeněk

doi:10.1016/j.measurement.2017.01.011

Cited by 13 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the optical microphone, a second laser was used for the detection of the movement of the cantilever. The laser beam reflected from the surface of the cantilever is aimed onto a position-sensitive detector (see refs , , and for more details). The GASERA software collects the harmonic components of the measured signal (i.e., performs the Fourier transformation).…”

Section: Methodsmentioning

confidence: 99%

Cantilever-Enhanced Photoacoustic Detection and Infrared Spectroscopy of Trace Species Produced by Biomass Burning

et al. 2018

Self Cite

View full text Add to dashboard Cite

The applicability of cantilever-enhanced photoacoustic spectroscopy (CEPAS), which exploits the unique properties of a micromechanical lever sensor (cantilever) in combination with tunable quantum cascade lasers (QCLs), is evaluated for the monitoring of several species produced by biomass burning. The detection limits of the selected molecules (HCOOH, CH3CN, CH3OH, CH3COCH3, CO2, and N2O) for a commercial CEPAS unit (GASERA) used together with QCLs were estimated under laboratory conditions. The normalized noise equivalent absorption (NNEA) coefficients for these molecules were determined experimentally, and the theoretical detection limits for the relevant biomass-burning products, accessed in the spectral ranges of available commercial QCLs in the mid-infrared region, were extrapolated using the determined NNEA values and the spectra simulated with the SpectraPlot software.

show abstract

Section: Methodsmentioning

confidence: 99%

Cantilever-Enhanced Photoacoustic Detection and Infrared Spectroscopy of Trace Species Produced by Biomass Burning

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Erbium‐doped ring lasers, [ 139 ] DFB, [ 140,141 ]

{\rm{C}}{{\rm{O}}_2}

lasers, [ 142 ] visible LEDs, [ 143 ] IR LEDs, [ 144 ] and THz diodes [ 145,146 ] are among the sources used with PA cells equipped with cantilevers. Lasers are more common than LEDs due to their higher optical power.…”

Section: Tunable Diode Laser Systemmentioning

confidence: 99%

“…[ 159,182 ] In its simplest form, the cantilever deflection can be measured using a laser impinging on the cantilever with a certain incidence angle and the reflected light is detected using a quadrant detector. [ 142,152 ]…”

Section: Tunable Diode Laser Systemmentioning

confidence: 99%

“…The deflection of the beam was detected using a laser and a quadrant detector. [ 142 ] Suchánek et al. [ 188 ] measured acetone

({{\rm{C}}_3}{{\rm{H}}_6}{\rm{O}}

), acetic acid

( {{\rm{C}}{{\rm{H}}_3}{\rm{COOH}}} ),

and methanol

( {{\rm{C}}{{\rm{H}}_3}{\rm{OH}}} )

using a circular cantilever made of mica.…”

Section: Tunable Diode Laser Systemmentioning

confidence: 99%

“…The motion of the cantilever is characterized by its high linearity and large dynamic range, which is larger than that of conventional membranes. [124][125][126]142,159] In addition to that, the limited sensitivity of the membrane cannot be improved by further decreases in the gap. [126] An experimental comparison of an electret microphone, a differential microphone and a cantilever demonstrated the superiority of the latter by two orders of magnitude over microphones.…”

Section: Excitationmentioning

confidence: 99%

See 2 more Smart Citations

Direct Absorption and Photoacoustic Spectroscopy for Gas Sensing and Analysis: A Critical Review

Fathy

Sabry

Hunter

et al. 2022

Laser & Photonics Reviews

View full text Add to dashboard Cite

Optical spectroscopy has a broad scientific basis in chemistry, physics, and material science, with diverse applications in medicine, pharmaceuticals, agriculture, and environmental monitoring. Fourier transform infrared (FTIR) spectrometers and tunable laser spectrometers (TLS) are key devices for measuring optical spectra. Superior performance in terms of sensitivity, selectivity, accuracy, and resolution is required for applications in gas sensing. This review deals with gas measurement based on either direct optical absorption spectroscopy or photoacoustic spectroscopy. Both approaches are applicable to FTIR spectroscopy or TLS. In photoacoustic spectroscopy, cantilever-based photoacoustic spectroscopy is focused due its high performance. A literature survey is conducted revealing the recent technological advances. Theoretical fundamental detection limits are derived for TLS and FTIR, considering both direct absorption and photoacoustic spectroscopies. A theoretical comparison reveals which technology performs better. The minimum normalized absorption coefficient and normalized noise equivalent absorption coefficient appear as key parameters for this comparison. For TLS-based systems, direct absorption spectroscopy is found to be the best for lower laser power and longer path length. For FTIR-based systems, direct absorption is found to be the best for low temperature sources, higher spectrometer throughput, faster mirror velocity, and longer gas cells.

show abstract

Research on the effect of the laser beam location on the performance of mid-infrared photoacoustic spectroscopy based gas detection system

et al. 2022

View full text Add to dashboard Cite

First application of multilayer graphene cantilever for laser photoacoustic detection

Cited by 13 publications

References 25 publications

Cantilever-Enhanced Photoacoustic Detection and Infrared Spectroscopy of Trace Species Produced by Biomass Burning

Cantilever-Enhanced Photoacoustic Detection and Infrared Spectroscopy of Trace Species Produced by Biomass Burning

Direct Absorption and Photoacoustic Spectroscopy for Gas Sensing and Analysis: A Critical Review

Research on the effect of the laser beam location on the performance of mid-infrared photoacoustic spectroscopy based gas detection system

Contact Info

Product

Resources

About